Protective sleeve



FIG. 1 is a perspective view showing our new design;

FIG. 2 is a back view of the design of FIG. 1;

FIG. 3 is a front view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is another side view thereof.

The broken lines shown in FIG. 7 are included for illustrative purposesonly and form no part of the claimed design.

The ornamental design for a protective sleeve, as shown and described.